SRT1000

Flow Measurement

Thermal Flowmeters

Thermal Flowmeters

Based on the long experienced know-how on the TOKYO KEISO's thermal flowmeters, SRT1000 series has enhanced its performance such as a reading accuracy, a reliable sealing by metal and a digital output. In measuring various gases it covers wider sizes ranging from 10 mm to even 1500 mm as standard.
Either the integral type with the sensor integrated with an indicator and converter or the separate type with an indicator and converter remotely mounted is available for the application.
Various outputs are available for your convenience such as pulse, high and low alarms, and digital output via RS485, as well as 4 to 20 mADC, 0 to 5, 0 to 10 VDC analog outputs all in standard features.
The SRT1000 covers much wider measuring range than the current thermal flowmeters.

Catalogs and Brochures

• SRT1000 Series

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*Specifications are subject to change without prior notice.

Features

• High accuracy
  Accurate flow measurement as high as ±1% R.D. between 10 to 100% F.S. and ±0.5% R.D. in less than 10% F.S. thanks to the unique calibration facilities.
• Metallic sealing
  The sensor has a metallic sealing mechanism, durable and corrosion resistant.
• Low pressure loss
  Negligible small pressure loss by a simple sensor made of stainless steel placed in the flow path.
• High speed response
  Not more than 1 second at 63% response.
• Temperature indication
  The sensor consists of a heated sensor and a temperature sensor which allows also temperature indication in the piping.
• Pressure compensation
  Flow rate compensation by inputting 4 to 20 mADC pressure signal for unstable process.
• Flow rate unit
  Normal flow rate at 0°C and 1 atm, standard flow rate, actual flow rate or mass flow rate is available.
• RoHS

Applications

• Semiconductor equipment gas lines
• Medical oxygen supply lines
• HVAC
• Process and utility lines for general industry

Specifications

Future/Type	Insertion type for large pipe sizes Integral type / Separate type	Inline type for medium pipe sizes Integral type / Separate type	Inline type for small pipe sizes Integral type / Separate type	Variable length insertion type
Model	SRT1100	SRT1200	SRT1300	SRT1400
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Measuring medium	Non-corrosive gases
Nominal diameter	50A to 1500A	40A to 150A	10A to 25A	50A to 900A
Flow range	Air/N₂ Max.: 35600 to 891700m³/h(nor) Min.: 63 to 1200 m³/h(nor)	Air/N₂ Max.: 425 to 10600 m³/h(nor) Min.: 50 to 780m³/h(nor)	Air/N₂ Max.: 33 to 330 m³/h(nor) Min.: 6.0 to 60 m³/h(nor)	Air/N₂ Max.: 12840 to 321000 m³/h(nor) Min.: 63 to 1200 m³/h(nor)
Fluid Temperature	-20 to 120℃
Fluid Pressure	1 MPa max.
Process Connection	Flange : JIS 10K/20K, ANSI 150/300, JPI 150/300 Insertion type by tube fitting : Outside diameter 20 mm SWL, VCR, Rc : 3/8", 1/2", 3/4", 1" Wafer : 40 to 150 mm
Accuracy	When measuring air or N2 ±1% R.D. ±1 digit between 10 to 100% F.S. and ±0.5% F.S. ±1 digit in less than 10% F.S. When measuring other gases than air or N2 ± (1% R.D.+1% F.S.) between 10 to 100% F.S. and ±1.5% F.S. in less than 10% F.S.